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61. 发明申请

US20050163283A1 Method for recording and evaluating image data with the aid of a tomography machine 有权
标题翻译：借助于断层摄影机记录和评估图像数据的方法
公开(公告)号：US20050163283A1
公开(公告)日：2005-07-28
申请号：US11043965
申请日：2005-01-28
申请人： Herbert Bruder , Thomas Flohr , Bjoern Heismann , Rainer Raupach , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Bjoern Heismann , Rainer Raupach , Karl Stierstorfer
IPC分类号： A61B6/03 , G01N23/00 , G01N23/06 , G06T1/00 , G21K1/12 , H05G1/60
CPC分类号： A61B6/032 , A61B6/4035 , A61B6/405 , A61B6/482 , Y10S378/901
摘要： A method is for recording and evaluating image data with the aid of a tomography machine. At least two recordings with different spectral distribution are made of an examination area of an object. Further, measured data obtained from the two recordings are evaluated such that additional information relating to the examination area and/or a specific representation of the image of the examination area are/is obtained from the different spectral distributions. The tomography machine includes at least two separate recording systems. Further, it is operated such that the two recording systems operate with a different spectral distribution. As such, the additional information and the specific representation of an image can be obtained in conjunction with a reduced scanning time.
摘要翻译：一种用于通过断层摄影机记录和评估图像数据的方法。具有不同光谱分布的至少两个记录由对象的检查区域构成。此外，评估从两个记录获得的测量数据，使得从不同的光谱分布获得与检查区域相关的附加信息和/或检查区域的图像的特定表示。断层摄影机包括至少两个单独的记录系统。此外，其操作使得两个记录系统以不同的光谱分布进行操作。因此，附加信息和图像的具体表示可以结合减少的扫描时间来获得。

62. 发明授权

US06901130B2 Retrospective and/or window-controlled filtering of images for adapting sharpness and noise in computed tomography 有权
标题翻译：用于在计算机断层摄影中适应锐度和噪声的图像的回溯和/或窗口控制滤波
公开(公告)号：US06901130B2
公开(公告)日：2005-05-31
申请号：US10644740
申请日：2003-08-21
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Stefan Schaller
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Stefan Schaller
IPC分类号： A61B6/03 , G06T1/00 , G06T5/00 , G06T5/20 , G06T11/00
CPC分类号： G06T11/008 , G06T5/007 , G06T2207/10081 , Y10S378/901
摘要： A method is for window-controlled filtering of CT images. A CT raw data record is acquired, for example, with the aid of a CT unit or of a C-arc unit. A primary data record is then reconstructed from the CT raw data record by way of, for example, a sharp convolution core and, for example, a narrow slice sensitivity profile. A transfer function is then provided as functional relationship between window width and image sharpness. The image sharpness of the CT image of a selected slice is then automatically calculated, situated in the primary data record, as a function of a selected window width for the selected slice by way of an image processing procedure on the basis of the transfer function.
摘要翻译：一种用于CT图像窗口控制滤波的方法。例如，借助于CT单元或C弧单元获取CT原始数据记录。然后，通过例如锐利的卷积核心和例如窄的片段灵敏度轮廓，从CT原始数据记录重构主数据记录。然后提供传递函数作为窗口宽度和图像清晰度之间的功能关系。然后，通过基于传递函数的图像处理过程，将所选切片的CT图像的图像清晰度自动计算为位于主数据记录中的所选切片的选定窗口宽度的函数。

63. 发明授权

US06819735B2 Histogram-based image filtering in computed tomography 有权
公开(公告)号：US06819735B2
公开(公告)日：2004-11-16
申请号：US10606798
申请日：2003-06-27
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
IPC分类号： A61B603
CPC分类号： G06T5/007 , G06T11/008 , G06T2207/10081 , Y10S378/901
摘要： A method is for organ-specific image optimization in computed tomography. In this case, the HU values of a layer of the body previously recorded with a CT device are calculated and, on this basis, a first CT image is created. For this first CT image, a histogram is also created, in which the frequency distribution of the HU values is reproduced. In a histogram, at least one organ-specific HU region is defined and the latter is allocated an HU-dependent transfer function. Furthermore, a second CT image is created on the basis of the previously calculated HU values for the layer of the body which has been recorded. The first and second CT image are filtered with the HU-dependent transfer function and, finally, the filtered first CT image is mixed with the filtered second CT image.

64. 发明授权

US06819734B2 Method for removing rings and partial rings in computed tomography images 失效
标题翻译：在计算机断层摄影图像中去除环和部分环的方法
公开(公告)号：US06819734B2
公开(公告)日：2004-11-16
申请号：US10290520
申请日：2002-11-08
申请人： Rainer Raupach
发明人： Rainer Raupach
IPC分类号： A61B603
CPC分类号： G06T11/005 , G06T5/002 , G06T5/10 , G06T5/20 , G06T2207/10081 , G06T2207/20032 , G06T2207/20192 , G06T2207/30004 , Y10S378/901
摘要： An algorithmic method is used for suppressing artifacts in computed tomography raw data, on the basis of the determination and subsequent subtraction of a correction sinogram from a measured starting sinogram. The method includes high-pass filtering of a starting sinogram in the channel direction, and low-pass filtering in the projection direction in order to improve the signal-to-noise ratio. Thereafter, the magnitude of a weighted gradient of each data point in the low-pass-filtered sinogram is formed, both in the projection direction and symmetrically about the corresponding channel axis. The data point is eliminated if the change amplitude thereof exceeds a first defined threshold value. Residual data points are removed in the low-pass-filtered sinogram if their amplitude exceeds a second defined threshold value, and low-pass filtering of the resulting sinogram occurs in the form of averaging in the projection direction. The correction sinogram thus obtained is finally subtracted from the starting sinogram.
摘要翻译：基于来自测量的起始正弦图的确定和随后的校正窦位图的减法，使用算法方法来抑制计算机断层摄影原始数据中的假象。该方法包括对信道方向上的起始正弦图进行高通滤波，并且在投影方向上进行低通滤波，以提高信噪比。此后，在投影方向和对应的通道轴上对称地形成低通滤波正弦图中的每个数据点的加权梯度的大小。如果数据点的变化幅度超过第一定义的阈值，则消除数据点。如果低通滤波正弦图幅度超过第二定义阈值，则残留数据点被去除，并且以投影方向平均的形式对所得到的正弦图进行低通滤波。这样得到的校正正弦图最终从起始正弦图中减去。

65. 发明授权

US06600801B2 Method for correcting for beam hardening in a CT image 有权
公开(公告)号：US06600801B2
公开(公告)日：2003-07-29
申请号：US09981478
申请日：2001-10-17
申请人： Rainer Raupach
发明人： Rainer Raupach
IPC分类号： A61B603
CPC分类号： G06T11/006 , G01N23/046 , G01N2223/419 , G06T5/006 , G06T2211/424 , Y10S378/901
摘要： A method for correcting for beam hardening in an initial CT image, which is composed of pixels arranged in a matrix, correction data are determined from the initial image by re-projection of the pixels from the initial image at a large number of projection angles, the pixels from the initial image being compared with a threshold value for each of the projection angles during the re-projection, and the re-projection being carried out for only those pixels from the initial image which have a pixel value above the threshold value. The correction data are used to determine a corrected image from the initial image.

66. 发明授权

US09498177B2 Contrast-dependent regularization strength in the iterative reconstruction of CT images 有权
标题翻译： CT图像迭代重建中的对比度依赖正则化强度
公开(公告)号：US09498177B2
公开(公告)日：2016-11-22
申请号：US12729272
申请日：2010-03-23
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Martin Sedlmair , Heinrich Wallschlager
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Martin Sedlmair , Heinrich Wallschlager
IPC分类号： G06K9/00 , A61B6/00 , A61B6/03 , G06T11/00
CPC分类号： A61B6/481 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/503 , A61B6/504 , A61B6/507 , A61B6/541 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measured data, the measured data being captured during a rotating movement of a radiation source of a computed tomography system around the examination object. In at least one embodiment, different iteration images of the examination object are determined successively from the measured data by way of an iterative algorithm, wherein with the iterative algorithm the current iteration image at any one time is high-pass-filtered and weighted as a function of contrast using a variable which contains contrast information relating to the current iteration image at that time.
摘要翻译：公开了一种用于从测量数据重建检查对象的图像数据的方法，所测量的数据在计算机断层扫描系统的辐射源围绕检查对象的旋转运动期间被捕获。在至少一个实施例中，通过迭代算法从测量数据连续地确定检查对象的不同迭代图像，其中利用迭代算法，任何时间的当前迭代图像被高通滤波并加权为使用包含与当时的当前迭代图像有关的对比度信息的变量的对比度的功能。

67. 发明申请

US20160300368A1 STRUCTURE-COMPLIANT NOISE REDUCTION DURING MULTISPECTRAL COMPUTED TOMOGRAPHY IMAGING 审中-公开
标题翻译：多重计算机图像成像期间结构合理的噪声减少
公开(公告)号：US20160300368A1
公开(公告)日：2016-10-13
申请号：US15091658
申请日：2016-04-06
申请人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Harald Schöndube
发明人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Harald Schöndube
IPC分类号： G06T11/00 , G06T5/00 , G06F19/00
CPC分类号： G06T11/005 , G06F19/00 , G06F19/321 , G06T11/006 , G06T2211/421 , G06T2211/424
摘要： A method for reconstructing image data during CT imaging is described. In the method, a plurality of independent data records of projection measured data are captured. A combined data record is then determined based on the captured data records. In addition, morphological information is determined based on the combined data record. A target data record is also determined based on the captured independent data records. A target image data record is reconstructed based on the target data record and the determined morphological information. An image data determination facility and a computed tomography system are also described.
摘要翻译：描述了在CT成像期间重建图像数据的方法。在该方法中，捕获投影测量数据的多个独立数据记录。然后，基于捕获的数据记录来确定组合的数据记录。另外，基于组合的数据记录来确定形态信息。目标数据记录也是基于所捕获的独立数据记录来确定的。基于目标数据记录和确定的形态信息来重构目标图像数据记录。还描述了图像数据确定装置和计算机断层摄影系统。

68. 发明授权

US08666129B2 Contrast intensification of CT images by way of a multiband filter 有权
标题翻译：通过多频段滤波器对CT图像进行对比增强
公开(公告)号：US08666129B2
公开(公告)日：2014-03-04
申请号：US12770825
申请日：2010-04-30
申请人： Bernhard Krauss , Rainer Raupach
发明人： Bernhard Krauss , Rainer Raupach
IPC分类号： G06K9/00 , G06K9/62
CPC分类号： G06T5/009 , A61B6/03 , A61B6/507 , G06T5/50 , G06T2207/10081 , G06T2207/30004
摘要： A method is disclosed for processing an output image of an examination object, with the output image having been reconstructed from measuring data acquired during a relative rotational movement between a radiation source of a computed tomography system and the examination object. An image frequency division of an output image takes place in at least a first and a second image. In at least one embodiment, the first image is changed by way of a first function, with the first function effecting a contrast intensification within the first image, and the changed first image and the second image are merged together.
摘要翻译：公开了一种用于处理检查对象的输出图像的方法，其中输出图像已经从计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动期间获取的测量数据重构。输出图像的图像分频发生在至少第一和第二图像中。在至少一个实施例中，通过第一功能改变第一图像，其中第一功能在第一图像内实现对比度增强，并且将改变的第一图像和第二图像合并在一起。

69. 发明授权

US08588493B2 CT image reconstruction for improving temporal resolution in cardio CT 有权
标题翻译：用于改善心脏CT时间分辨率的CT图像重建
公开(公告)号：US08588493B2
公开(公告)日：2013-11-19
申请号：US12849082
申请日：2010-08-03
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Karl Stierstorfer
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B5/0456 , A61B6/4014 , A61B6/482 , A61B6/503 , A61B6/507 , G06T11/006 , G06T2211/412 , G06T2211/424 , G06T2211/436
摘要： A method is disclosed for reconstructing image data of a moving examination object from measurement data, wherein the measurement data was captured in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination object. In at least one embodiment of the method, a first image of the examination object is calculated from a complete measurement data record of the measurement data for an image reconstruction and a second image of the examination object is calculated from an incomplete measurement data record of the measurement data for an image reconstruction. Frequency splitting of the first and second images takes place respectively in at least one low-frequency and one higher-frequency component and the image data of the second image is supplemented in the low-frequency component with image data of the low-frequency component of the first image. In a further processing step the second image thus supplemented is improved using the first image, in that errors due to the incompleteness of the measurement data record of the second image are reduced.
摘要翻译：公开了一种用于从测量数据重建运动检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动的过程中捕获测量数据。在该方法的至少一个实施例中，根据用于图像重构的测量数据的完整测量数据记录来计算检查对象的第一图像，并且从不完整的测量数据记录计算检查对象的第二图像用于图像重建的测量数据。第一和第二图像的频率分割分别发生在至少一个低频和一个较高频分量中，并且第二图像的图像数据在低频分量中被补充，低频分量的图像数据是第一张图片。在另外的处理步骤中，使用第一图像来改善如此补充的第二图像，因为减少了由于第二图像的测量数据记录的不完备性造成的错误。

70. 发明授权

US08442293B2 CT image reconstruction in the extended field of view 有权
标题翻译： CT图像重建在扩展视野中
公开(公告)号：US08442293B2
公开(公告)日：2013-05-14
申请号：US13018724
申请日：2011-02-01
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Karl Stierstorfer
IPC分类号： G06K9/00 , A61B6/00
CPC分类号： A61B6/4014 , A61B6/027 , A61B6/032 , A61B6/4441 , A61B6/482 , A61B6/507 , G01N23/046 , G01N2223/401 , G01N2223/419 , G01N2223/612 , G06T11/006 , G06T2211/432
摘要： A method is disclosed for reconstructing image data of an examination subject from measured data, wherein the measured data was acquired in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination subject. A limited area between the radiation source and a detector represents a field of view in respect of which measured data can be acquired, and parts of the examination subject were located at least temporarily outside the field of view in the course of the measured data acquisition. In at least one embodiment, first image data is reconstructed from the measured data, and a boundary of the examination subject is determined with the aid of the first image data. The first image data is subsequently modified using the determined boundary, and projection data is calculated from the modified first image data. The measured data is modified using the projection data, and finally second image data is reconstructed from the modified measured data.
摘要翻译：公开了一种用于从测量数据重建检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源与检查对象之间的相对旋转运动的过程中获取测量数据。辐射源和检测器之间的有限区域表示可以获取测量数据的视野，并且在测量数据采集的过程中检查对象的部分至少临时定位在视场外。在至少一个实施例中，从测量数据重建第一图像数据，借助于第一图像数据确定检查对象的边界。随后使用所确定的边界修改第一图像数据，并且从修改的第一图像数据计算投影数据。使用投影数据修改测量数据，最后从修改的测量数据重建第二图像数据。

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